Found this:
Section A: 4 short questions on the Core topics, 20 marks per question, marked out of your best 3. Attempt all four.
Section B: 3 long questions on the Core topics. 45 marks per question, marked out of your best two. Read all three, do the two you are most confident on, if you have time at the end of the exam then attempt the third.
Section C: This section has 5 optional areas on Applied Graphics but you will only be marked on two of these. The areas covered are Structural Forms and Geological Geometry. Do not waste time attempting another question in this section.
The exam is 3 hours long which allows for around 35 minutes for each of the long questions and another 35 minutes for all of the short questions in Section A.